Eton has debuted its new Mobius rechargeable battery case with solar panel for the iPhone 4. The Mobius combines an 1,800 mAh lithium ion battery pack with a high-efficiency solar panel that’s used to recharge the battery when not in use. Other features include a Micro USB port for charging the battery via USB, dedicated charge indicators for the battery and solar panel, and a standby switch for control over when the battery is supplying power…
